Stevia

What Is Stevia?

Stevia is a natural, zero-calorie sweetener derived from the leaves of the plant Stevia rebaudiana, native to South America. The sweet compounds responsible for its taste are called steviol glycosides, with rebaudioside A (Reb-A) and stevioside being the most abundant and commercially used. Stevia extract can be 200–350 times sweeter than table sugar, meaning only tiny amounts are needed to achieve the same level of sweetness.

Unlike sugar, steviol glycosides are not metabolized for energy by the body. They pass through the digestive tract largely intact, making stevia a suitable option for people managing blood glucose levels, including those with type 2 diabetes.

Safety and Regulation

Regulatory agencies worldwide have evaluated stevia glycosides and found them safe for human consumption. The U.S. Food and Drug Administration (FDA) has granted Generally Recognized as Safe (GRAS) status to high-purity stevia extracts (at least 95% steviol glycosides). The European Food Safety Authority (EFSA) and the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have established an Acceptable Daily Intake (ADI) of 4 mg per kg of body weight per day, expressed as steviol equivalents.

Some individuals report a mild bitter or licorice-like aftertaste, attributed to certain glycoside compounds. Newer extraction methods and blending techniques have reduced this characteristic in many commercial products.

Practical Uses and Health Considerations

Stevia is heat-stable and can be used in cooking and baking, though it does not provide the bulk, browning, or moisture-retention properties of sugar. It is commonly found in:

• Beverages such as teas, soft drinks, and flavored water
• Dairy products including yogurt and flavored milk
• Tabletop sweetener packets
• Low-calorie baked goods and desserts

Research suggests stevia may have a neutral or slightly beneficial effect on blood glucose and insulin response. It does not promote tooth decay and is recognized as non-cariogenic. Individuals with allergies to plants in the Asteraceae family (such as ragweed and chrysanthemums) should use caution, as rare cross-reactive responses have been reported.